Stud welding unit



FIG. 1 is a front perspective view of a stud welding unit showing our new design;

FIG. 2 is a front elevational view of the stud welding unit;

FIG. 3 is a rear elevational view of the stud welding unit;

FIG. 4 is a right side elevational view of the stud welding unit;

FIG. 5 is a left side elevational view of the stud welding unit;

FIG. 6 is a bottom plan view of the stud welding unit; and,

FIG. 7 is a top plan view of the stud welding unit.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a stud welding unit, as shown and described. 